Ventilating-beg-tjlatob and dampeb



J. MAGEE.

Damper.

Patented lMaly 20', 1856.

UNITED sTATEs PATENT oEEioE.

JOHN MAGEE, OF LAWRENCE, MASSACHUSETTS, ASSIGNOR TO JNO. MAGEE AND4 WM. J. TOWNE, 0F NEWTON, MASSACHUSETTS.

VENTILATING-REGULATOR AND DA1/[PER FOR STOVES.

Specication forming part of Letters Patent No. 14,940, dated May 20, 1856; Reissued November" To all whom t may concern Be it known that I, Jol-IN MAGEE, of Law` rence, in the county of Essex and State of Massachusetts, have invented an Improved Ventilating-Register and Damper to be Applied to Stoves, constructed so as to have a downward draft; and I do hereby declare that the same is fully described and represented in the following specification and the accompanying drawings, of which- Figure l, exhibits a side elevation of a stove with my improvement applied to it. Fig. 2, a central, vertical, and longitudinal section of said stove. Fig. 3, a vertical section of the upright flue pipe and the ventilating damper. Fig. 4, is a rear view of said pipe.

In these drawings, A, denotes the main body or outer case of a stove, having within it, and arranged eccentrically the chamber of combustion, B, provided with a fireplace opening and door as seen at C, and also an ash pit and a grate asseen at D and E, the said ash pit and the said chamber of combustion being entirely separated from the surrounding space or chamber F, (formed within the case A) except at the top of said chamber of combustion, where there are one or more openings, G, through which the smoke and volatile products of combustion can pass from the chamber B, directly into the flue space, F. Out of the upper part of the said flue space, F, a horizontal discharge pipe, I-I, is carried as seen in Figs. l and 2, and is provided with a damper a.

By means of a vertical flue pipe, I, the lower part of the iue space, F, is connected with the pipe, I-I, in advance of the damper thereof, a portion ZJ of said vertical pipe, I, being formed as a rectangular box provided with an opening, c, through one side of it. Within the box, I arrange a door or damper, CZ which is hinged at its lower end to that side of the box through which the opening c, is made, said door being of a width to correspond with the width of the interior of the box and of a length somewhat greater than the vertical length of the opening c, and the horizontal width of the box,y Z), it being intended that said door shall not only serve as a damper to regulate the flow of smoke through the vertical pipe, I, but also and at the same time, as a valve to regulate the admission of external air into the pipe, I, and through the opening, 0.

The more the valve or door, d, is opened or turned inward, the greater will it make the passage for the admission of air into the tube or pipe, and the more will it shut off or diminish the flow of the products of combustion through the pipe, I. A contrary effect is produced in proportion as we move the door, d, toward the opening0. And thus it will be seen that by means of said opening, c, and said door, d, arranged in manner as set forth we are enabled to accomplish peculiar effects.

It is not new, to make a stove with a stand pipe, I, connecting its downward flue or draft, F, with the main discharge pipe and in advance of the damper thereof; nor is it new to have an opening either in the said upright pipe or in the downward draft flue for the purpose of admitting air into either of the same and so as not only to ventilate a room or apartment in which the stove may be placed, butalso to diminish the draft. In such case, the door of the opening has always been made t-o open outward and in no respect to operate as a damper for the purpose of interrupting, more or less, the flow of smo-ke through the stand pipe or vertical discharge flue, as it does in my improved arrangement of it.

It has been found in practice that although the opening for the admission of air may be very large it willnot operate to good advantage so long as its door opens outward, as it affords little or no check to the draft, but rather tends to increase it. It should be observed, that, the purpose of the opening is to ventilate the room, as well as to admit air into the flue in order to cool it .and aid in checking the draft.

By having the valve or door to open inward and into the flue pipe, in accorda-nce with my improvement, it will be seen that such valve not only aids in checking the draft, but its opening or passageserves not only to ventilate the room, but to supply air to the flue pipe.

In Figs. 1 and A, f, exhibits a spring lever or handle extending from the damper CZ, and on the outside portion, 5, of the pipe I, and made to work into a notched rack or arc, g, and in such manner as to enable the damper to be moved and set or fixed, either in a. vertical or in such an inclined positie as circumstances may require;

I lay no claim to the invention of having an lair passage leading into the downward draft flue and provided with a door opening outward nor do I claim the principle of applying a damper so that it may be coIn- Inon to two or more openings or fines; but What I do clai-ni is combining with, or arranging in the flue pipe, I, when the stove is constructed substantially as described (via, with two discharge pipes, H, I, ar-

ranged as specified) a rectangular hoX o1' chamber, b, formed with an opening o, and so as to receive within it, and permit to operate in manner as described, a rectangular valve or damper 0l.

In testimony whereof, I have hereunto set my signature this eighth day of March 20 JOHN MAGEE.

Witnesses:

NANCY M. GRIFFIN, GEORGE FOSTER.

[FIRST PRINTED 1912.] 

